The Pilgrims have launched an initiative, titled £BigForBarnet, which has seen entrance prices slashed and a number of deals introduced including free entry for children in a bid to pack out the ground.
And Sheridan, whose side head into the game rock bottom of the Football League, knows their form has to improve in front of their own supporters having overseen just one home win since taking charge.
"We need to be a lot better at home," he said. "We need to be courageous and brave and take charges. We need to be positive and get on the ball.
"We've been very lethargic at home and we need to get a bit more drive and endeavor.
"I don't have to give a message to the fans because they've been behind us from day one. I honestly can't believe how good they've been, for a team to be bottom of the league and get the support we are getting is frightening.
The fans have been different class and we need to give them a bit of hope and positivity."